The multi-stage sampling process described in the previous sections yielded
a random national sample of households with telephones, drawn proportionate
to the population distribution. The final stage required the selection of
one respondent per household for the interview.

A systematic selection procedure was used to select one designated respondent
for each household sampled. The "most recent/next birthday method" was
used for within household selection among multiple eligibles. This procedure
has been widely used for two decades because it permits unbiased systematic
selection without requiring full household enumeration.2 The Within Household
Selection Procedure is presented in Figure 1. The CATI system alternated
the "most recent" and "next" birthday specification for
the selected respondent to avoid a temporal bias for birthdays before (or
after) the field period.

FIGURE 1
Within Household Selection Procedure:
Adult Cross Section

TIME
START: _____________ TIME END: _____________
DATE: _____________
BATCH #:____________ CATI RESP. #: ______________
SAMPLE POINT #: ___
___ ___ GENDER OF RESP.: MALE [ ] FEMALE [ ]
RESP PHONE NUMBER: ________________________________________
RESP
POSITION IN HOUSEHOLD: ________________________________________________
INTERVIEWER
NAME: __________________________________________________________
THIS INTERVIEW IS A: COMPLETE [ ] CALLBACK FOR COMPLETION [ ]
TERMINATE
AT Q_____ [ ]
INTRODUCTION TO BE ADMINISTERED TO ANY ADULT HOUSEHOLD
MEMBER:
Hello, I'm calling for the U.S. Department of Transportation.
We are conducting a study of Americans' driving habits and their attitudes
about current driving laws. The interview is completely confidential.
C1.
In order to select just one person to interview, could I speak to the
person in your household, age 16 and older, who has had the most recent/next
birthday?

Respondent is that person [CONTINUE WITH CATI AND ENTER Q1 AS
C1]..................1
Other respondent came to phone [CONTINUE WITH CATI AND ENTER Q1 AS C1]..........2
Respondent is not available.......................................................................................................3
[ARRANGE CALLBACK AND RECORD IT, ALONG WITH THE RESPONDENT'S FIRST NAME OR HH
POSITION, ON THE SAMPLE SHEET. ATTACH THIS SHEET TO SAMPLE AFTER FILLING OUT
APPLICABLE RESPONDENT INFO AT THE TOP. WHEN THE NEXT INTERVIEWER REACHES THIS
PERSON, THEY WILL ENTER Q1 AS C1]